2012

You can add construction geometry (BCONSTRUCTION command) to the
selection sets of legacy actions. The construction geometry is not affected by
the visibility states. It is filtered from the selection set in the BVSTATE
command when you add or remove geometry from a visibility state.
NOTE When you explode a block containing construction geometry in previous
versions of AutoCAD, the geometry is hidden in the drawing.
See also:
■
Draw Construction and Reference Geometry on page 588
■ Add Constraints to Geometry on page 713
Quick Reference
BCONSTRUCTION
Converts geometry into construction geometry.
BVSTATE
Creates, sets, or deletes a visibility state in a dynamic block.
BLOCKTESTWINDOW
Indicates whether or not a test block window is current.
Attach Data to Blocks (Block Attributes)
You can attach information to blocks and later extract the information to
create a bill of materials or other report.
Overview of Block Attributes
An attribute is a label or tag that attaches data to a block. Examples of data
that might be contained in an attribute are part numbers, prices, comments,
and owners' names. The tag is equivalent to a column name in a database
table. The following illustration shows a block with four attributes: type,
manufacturer, model, and cost.
Attach Data to Blocks (Block Attributes) | 775